SGD Classifier


Difficulty: 2 | Problem written by zeyad_omar
Problem reported in interviews at


Stochastic Gradient Descent is a supervised learning algorithm that uses gradient descent to optimize the weights (parameters).

In this problem, you are asked to use sklearn to implement an SGDClassifier model to predict the labels of the X_test after training on X_train and y_train.

PLEASE use these hyperparameters to match the output of our test cases:




Sample Input:
<class 'list'>
X_train: [[4.6, 3.1, 1.5, 0.2], [5.9, 3.0, 5.1, 1.8], [5.1, 2.5, 3.0, 1.1]]
<class 'list'>
y_train: [0, 2, 1]
<class 'list'>
X_test: [[5.8, 2.8, 5.1, 2.4], [6.0, 2.2, 4.0, 1.0], [5.5, 4.2, 1.4, 0.2]]

Expected Output:
<class 'numpy.ndarray'>
[1 1 1]

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Input Test Case

Please enter only one test case at a time
numpy has been already imported as np (import numpy as np)